% arara: xelatex
% arara: xelatex
% arara: xelatex
\documentclass{article}
\usepackage[UTF8]{ctex}
\usepackage{amsmath}
\usepackage{amssymb}

\newcommand{\texorpdfstring}[1]{}
\newcommand{\tightlist}[1]{}

\begin{document}
% \include{detect}
% \include{another}
\include{expectation}
\end{document}